<article id="wikiArticle">
<div> <div class="blockIndicator deprecated deprecatedHeader">
<p><strong><span class="icon-only-inline" title="This is an obsolete API and is no longer guaranteed to work."><i class="icon-trash"> </i></span> 已废弃</strong><br/>该特性已经从 Web 标准中删除，虽然一些浏览器目前仍然支持它，但也许会在未来的某个时间停止支持，请尽量不要使用该特性。</p>
</div></div>
<p><code><strong><em>function</em>.arguments</strong></code> 属性代表传入函数的实参，它是一个类数组对象。</p>
<h2 id="描述">描述</h2>
<p><code><em>function</em>.arguments</code> 已经被废弃了, 现在推荐的做法是使用函数内部可用的 <a href="Reference/Functions/arguments" title="arguments 是一个对应于传递给函数的参数的类数组对象。"><code>arguments</code></a> 对象来访问函数的实参。</p>
<p>在函数递归调用的时候（在某一刻同一个函数运行了多次，也就是有多套实参），那么 <code>arguments</code> 属性的值是最近一次该函数调用时传入的实参，下面的示例有演示。</p>
<p>如果函数不在执行期间，那么该函数的 <code>arguments</code> 属性的值是 <code>null</code>。</p>
<h2 id="示例">示例</h2>
<pre><code  class="language-javascript">function f(n) { g(n - 1); }

function g(n) {
  console.log('before: ' + g.arguments[0]);
  if (n &gt; 0) { f(n); }
  console.log('after: ' + g.arguments[0]);
}

f(2);

console.log('函数退出后的 arguments 属性值：' + g.arguments);

// 输出：

// before: 1
// before: 0
// after: 0
// after: 1
// 函数退出后的 arguments 属性值：null
</code></pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">规范名称</th>
<th scope="col">规范状态</th>
<th scope="col">备注</th>
</tr>
<tr>
<td><a class="external" href="https://www.ecma-international.org/publications/files/ECMA-ST-ARCH/ECMA-262,%201st%20edition,%20June%201997.pdf" hreflang="en" lang="en" rel="noopener" title="ECMAScript 1st Edition (ECMA-262)">ECMAScript 1st Edition (ECMA-262)</a></td>
<td><span class="spec-Standard">Standard</span></td>
<td>arguments 属性首次实现于 JavaScript 1.0，首次添加进规范是在 ES1，在 ES3 中被删除。</td>
</tr>
<tr>
<td><a class="external" href="https://www.ecma-international.org/ecma-262/5.1/#sec-10.6" hreflang="en" lang="en" rel="noopener">ECMAScript 5.1 (ECMA-262)<br/><small lang="zh-CN">arguments object</small></a></td>
<td><span class="spec-Standard">Standard</span></td>
<td><a href="Reference/Functions/arguments" title="arguments 是一个对应于传递给函数的参数的类数组对象。"><code>arguments</code></a></td>
</tr>
<tr>
<td><a class="external" href="https://www.ecma-international.org/ecma-262/6.0/#sec-arguments-object" hreflang="en" lang="en" rel="noopener">ECMAScript 2015 (6th Edition, ECMA-262)<br/><small lang="zh-CN">arguments object</small></a></td>
<td><span class="spec-Standard">Standard</span></td>
<td><a href="Reference/Functions/arguments" title="arguments 是一个对应于传递给函数的参数的类数组对象。"><code>arguments</code></a></td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<div><div class="blockIndicator warning"><strong><a class="external" href="https://github.com/mdn/browser-compat-data" rel="noopener">We're converting our compatibility data into a machine-readable JSON format</a></strong>.
            This compatibility table still uses the old format,
            because we haven't yet converted the data it contains.
            <strong><a class="new" href="/zh-CN/docs/MDN/Contribute/Structures/Compatibility_tables" rel="nofollow">Find out how you can help!</a></strong></div>
<div class="htab">
<a id="AutoCompatibilityTable" name="AutoCompatibilityTable"></a>
<ul>
<li class="selected"><a>Desktop</a></li>
<li><a>Mobile</a></li>
</ul>
</div></div>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
</tr>
<tr>
<td>Basic support</td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Chrome for Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
<td><span style="color: #888;" title="Please update this with the earliest version of support.">(Yes)</span></td>
</tr>
</tbody>
</table>
</div>
<h2 id="相关链接">相关链接</h2>
<ul>
<li><a href="Reference/Functions/arguments" title="arguments 是一个对应于传递给函数的参数的类数组对象。"><code>arguments</code></a></li>
<li><a href="Reference/Functions" title="有关更多示例和说明，请参阅有关函数的JavaScript指南。">函数和函数的作用域</a></li>
</ul>
</article>